This feels like Doing It Wrong, but some of the letters just don't look centered over their radio buttons. Nudge them a pixel.
I was setting the window size and letting the contents fill to fit. Now I'm setting the content size and letting the window size itself to fit around it. The latter feels like it'll hold up better as things change.
"ProjWin" didn't really mean anything. "WpfGui" emphasizes that the contents are a WPF implementation of the GUI elements. No substantive changes.